Showing posts with label adam. Show all posts
Showing posts with label adam. Show all posts

The Psychology of Judgment and Decision Making (McGraw-Hill Series in Social Psychology) Review

The Psychology of Judgment and Decision Making (McGraw-Hill Series in Social Psychology)
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The Psychology of Judgment and Decision Making (McGraw-Hill Series in Social Psychology) ReviewThis is a fascinating book analyzing how we are all far less Cartesian than we think. In other words, a slew of predictable human bias flaws what we feel is our own objective judgment. The author eminently demonstrates this point by forcing the reader to take a 39 questions test at the beginning of the book. This test is stuffed with all the traps that illustrate the human judgment flaws that he analyzes thoroughly in following specific chapters.
You can view the test as a very entertaining IQ test from hell. The questions seem often simple. But, they are not. Other times, they are obviously difficult. I got a bit more than half of them correct. This was mainly because I had some knowledge or experience regarding certain traps the questions presented. I had made the mistake before. So, I learned from that. When I did not have any prior knowledge of a question, my results were very human, meaning not that good. But, learning the correct answer was both fun and educating.
The author touches on several fascinating probability and statistic concepts. One of them being the Bayes theorem, which suggests that medical screen test can be highly unreliable despite being touted as 80% to 90% accurate. In other words, you better understand the Bayes theorem better than the medical specialists who screen you for various diseases. Because, based on the author's study, doctors don't have a clue. Another chapter had an excellent discussion on correlation vs. causation. This includes some tricky nuances that many analysts in the financial industry trip upon. Another interesting probability concept is why it takes only 23 people in a room to have greater than a 50% that two of them share the same birthday. This seems impossible, but it is true.
The book has obviously a lot more than I am letting on here. I am not going to ruin it for you. It is really fun, educating, and interesting to read. You will also learn a whole lot about how you think, how others think, and how people think in groups. You will also understand how tricky it is to ask truly open and objective questions. Also, polls that seem objective are not due to the subjective structure of the question. I think you will enjoy this book, and I strongly recommend it.The Psychology of Judgment and Decision Making (McGraw-Hill Series in Social Psychology) Overview

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Contrarian Investment Strategies - The Next Generation Review

Contrarian Investment Strategies - The Next Generation
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Contrarian Investment Strategies - The Next Generation ReviewThe key idea in this book constitutes sound common-sense advice to any investor: buy a diversified portfolio of out-of-favor stocks with sound underlying businesses (e.g., low P/E firms) and sell when the market recognizes their value. The book is controversial because it slams current academic theories on how the market works, especially the idea of "efficient markets". Dreman believes that simply because of the way our minds work, the market tends to systematically over-react or under-react to news (especially earnings reports), and this can be exploited forever (because the way our minds are wired is not going to change). Other controversial ideas: 1) don't buy index funds (because the committees which make indexes tend to put in firms which have had a price run-up and drop firms which have had a price decline, so that buying the index involves buying high and selling low); 2) don't buy NASDAQ stocks unless they have great volume (because NASDAQ market-makers are not regulated enough, and will cheat you on the spread); 3) avoid international (non-US) stocks (because international markets have performed much worse than the US stock market over time); 4) equities are a safer way to hold money than treasury bonds or gold or cash (because of inflation and taxes). The author presents fairly detailed statistical evidence to show that his methods have worked over the past several decades. This is actually evidence that even academics are beginning to notice.
That said, it should be noted that the author's Kemper-Dreman fund (ticker: KDHAX) has done pretty badly in the last few years. Also, some of the stock picks in his Forbes column have been horrible. The most glaring example would be Prison Realty (ticker: PZN), which is currently hovering on the verge of bankruptcy. Dreman recommended it because of its REIT status and its high dividend yield both of which went away shortly after.
My 2c: consider the guy's broad investment strategies with respect, but don't follow his (or anyone else's) picks without putting in your own research.Contrarian Investment Strategies - The Next Generation Overview

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